Liverpool manager Jurgen Klopp is "not too happy" with the club's fixture congestion over the festive period.
The Reds have less than 48 hours between matches against Manchester City and Sunderland after the games were rescheduled for television coverage.
The home match against City is now at 17:30 GMT on 31 December - and kick-off at Sunderland is 15:00 on 2 January.
Klopp, 49, said he "cannot believe" the turnaround time, adding: "How do you prepare a team for this?"
The German, who has guided Liverpool to fourth in the Premier League after seven games, said: "Do you say 'only 50% against City because we have Sunderland on Monday?